Water-tube boiler.



No. 868,891. PATENTED OUT. 22. 1907. E. G'- RUST.

WATER TUBE BOILER.

APPLIUATIOH FILED H2126, 1906.

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INVENTOR W175: O g

a I 1 r 6% Wm No. 868,891. PATENTED 001?. 22190'2.

13. G. RUST.

WATER TUBE BOILER.

APPLICATION TILED FEB. 26, 1906.

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W1 TNESSE'S 11V VENTOH A ttorncys No. 868,891. PATENTED OCT. 22. 1907.

E. G. RUST.

WATER TUBE BOILER. APPLIOATION FILED FEB. 2a, 1900.

3 BHEETS-SHEET 3.

WITNEJEES: V V IN VEJVTOR A 7 M, K By W I EDWIN G. RUST, OF ELK RAPIDS,MICHIGAN.-

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Oct. '22, 1907.

Application as February 26,1906. Serial No- 302,855.

To all whom 'it may concern:

Be it known that I, EDWIN G. RUST, a citizen of the United States,residing at Elk Rapids, in the county of Referring to the drawings whichaccompany this specification and form a part hereof, Figure 1 is asection from front to rear of one form of a boiler construction inaccordance with my invention; Fig. 2, a similar view of a second form ofa boiler involving my invention; Fig. 3, a front elevation of the upperportion of a boiler, a portion being broken away to show a secondform ofmy invention, wherein the steam drum or super-heater drum. is arrangedtransversely of the remaining drums; and Fig. 4, a view similar to Fig.1, I

but with the super-heater connected to the upper steam and water drumsby pipes above thesetting.

On the drawings 1' and 2 designate a pair of horizontal steam and waterdrums connected together by an approximately horizontal bank of straighttubes 3, preferably five in number.

Below the drums -l and 2 are a pair of horizontal drums 4 and 5connected together by an inclined bank of preferably .five straighttubes 6.

The drums 1 and 4 are connected by 'the water circulators 7, while the.drums 2 and 5 are connected by the water circulators- 8, the latterbeing preferably shorter than the circulators 7. preferably belowthehigher end of the bank 6.

A baffle-tiling 10 is placed above the upper row of the bank 6, a space11 being left between the tiling and the drum 4 for the escape of thegases. From the passage 11 the gases pass up the baffle-wall 12 and thearch 13 on one side and the baffle-tiling 14 on the other, the latterbeing preferably placed between the rows of circulators 7', but thetiling may be placed differently, 'or even omitted, if desired. Byplacing it as shown, the

, circulation would probably be more positively direct- .ed, as the reartubes will in that case be in a distinctly cooler place than the frontones.

Between the two upper rows of tubes of the bank 3 I place thebafile-tiling 15, between which and the drum 2 is the passage 16 for thegases. Above the bank of tubes 3 is the drum 17, which is connected tothe drums 1 and 2 by the curved tubes 18.

' stack.

The grate 9 is placed This drum and the tubes 18 contain steam only, asthey are above the water-line 19; and they are in the path of the gasesas they pass from the passage 16 to the stack connection 20. The drum 17may be placed further forward or rearward, or even over either of thedrums 1 or 2, if preferred. The water-line is shown approximately at thecenter of the upper row of tubes 3 and the drum 1 is shown slightlyhigher than the drum 2 to permit the water to pass more readily from theformer to the latter, but'these drums may be placed at the same level,or the drum 1 may be at a lower level than the drum"2, if desired.

The steam outlet is indicated at 21 at the top of the drum 17. Thegasesflow over the bridge wall 22 and down among the tubes 6, up through thepassage 11, between the baffle walls 12 and 14 and forward among thefour lower. rows of tubes 3, the baffle wall 23 assisting to confine thegases to the space occupied by these tubes. The gases pass up throughthe passage 16 and then rearwardly among the tubes 18 and against steamdrum 17, and finally through the connection 20 into the The main watercirculation is opposite the travel of the gases. The feedwaterpreferably enters the drum 4 as shown at 23 on Fig. 2.

The boiler is provided with the small cleaning doors 24, in the side ofthe setting to give access to the larger spaces in the boiler for thepurpose of inspection, cleaning, and repairing. The drum 5 is supportedrigidly on the setting while the drum 4 is supported on the saddle 24mounted on the rollers 26.

The drums 1, 2, 4, and 5 are cylinders provided with individual bossesfor the tubes 3 and 6, the bosses not materially affecting the circularform of the crosssection of the drums, as the space between the bossesconforms to the general contour of the drums.

Referring now to Fig. 2, the construction is the same as on Fig. 1except that the baffle-wall 14 and the steam superheater have beenomitted; the number of rows or the tubes 7 have been increased to threerows, but the 7 number may be more or less than three, as desired; thedrums l and 5 have been connected by the row of tubes 25, but there maybe more than one row of these tubes, if desired and they may connect thedrums differently than shown. 1

In place of the steam superheater of Fig. 1, I have placed a steam drum17 longitudinally of the setting above the drums 1 and 2, to which thedrum 17 is connected by the steam connectors 26. The drum 17 isseparated from the path of the gases by thebaflle 27.

Fig. 3 does not differ materially from Fig. 2, except that the drum 17is placed in the arch 28 in the roof of the setting, the under portionof the drum 17 being ex posed to the heat of the furnace gases as theypass above the baffle 15.

In Fig. 4 the steam drum 17" is shown in an arch 28 which runs at aright angle to the arch shown on Fig. 3. The steam tubes 29 extend fromthe drums 1 and 2 over the roof of the setting to the steam drum 17 Iclaim 1. In a water-tube boiler, a pair of front horizontal drums atdifferent levels, water-circulators connecting the same, a pair of rearhorizontal drums at diiferent levels, water-circulators connecting thesame, a bank of tubes connecting the upper drums, a bank of tubesconnecting the lower drums, and a battle arranged to direct the gasesfrom the front of the boilerrearwardly along the lower bank of tubes, abathe arranged to direct the gases from the rear end of the boilerupwardly among the rear set of water circulators, means preventing thegases passing thence rearwardly around the /rear upper drum, a battlearranged to direct the gases. forwardly from the rear of the boileralong the upper bank of tubes.

2 In a water-tube boiler, a pair of front horizontai drums at differentlevels, water-circulators connecting the same, a pair of rear horizontaldrums at different levels, water circulators connecting the same, a bankof tubes connecting the upper drums, the rear upper drum being at ahigher level than the front upper drum, a bank of tubes connecting thelower drums, and a bathe arranged to direct the gases from the front ofthe boiler rearwardly along the lower bank of tubes, a baiile arrangedto direct the gases from the rear end of the boiler upwardly among therear set of water circulators, means preventing the gases passing thencerearwardly around the rear upper drum, a bathe arranged to direct the.gases forwardly from the rear of the boiler alongthe upper bank oftubes.

3. In, a water-tube boiler, a pair of front horizontal steam and waterdrums at different levels, water-circa lators connecting the same, apair of rear horizontal drums at different levels, water circulatorsconnecting the same, a bank of tubes connecting the upper drums, a bankof tubes connecting the lower drums, the rear lower drum being at alower level than the front lower drum, and a battle arranged todirectthe gases from the front of the boiler rearwardly along the lowerbank of tubes, a bailie arranged to direct the gases from the rear endof the boiler upwardly among the rear set of water circulators,

means preventing the gases passing thence 'rearwardly around the rearupper drum, a bafile arranged to direct the gases forwardly from therear of the boiler along the upper bank of tubes.

4. In a water-tube boiler, a pain of front horizontal steam and waterdrums at different levels, water circulators connecting the same, a pairof rear horizontal drums at different levels, water circulatorsconnecting the same, a bank of tubes connecting the upper drums, therear upper drum being at a higher level than the front upper drum, abank of tubes connecting the lower drums, the rear lower drum being at alower level than the front lower drum, and a bafiie arranged to directthe gases from the front of the boiler rearwardly along the lower bankof tubes, a baffle arranged to direct the gases from the rearend of theboiler upwardly among the rear set of water circulators, meanspreventing the gases passing thence rearwardly around the rear upperdrum, 9. baiiie arranged to direct the gases forwardly from the rear ofthe boiler along the upper bank of tubes.

5. In a water-tube boiler of the horizontal type, front and rear upperdrums and front and rear lower drums, water circulators connecting thefront drums, circulators connecting the rear drums, a bank of tubesconnecting the upper drums, a bank of tubes connecting the lower drums,baffles arranged to cause the gases to traverse serially the lower andupper banks of tubes, a baflie arranged between the rows of rearwater-circulators, a baifie arranged to cause the gases to pass from thelower bank of tubes along the water-circulators on one side of the saidbafiie between the circulators.

6. In a water-tube boiler, a'pair of front and rear lower drums, thefront being at a higher elevation than the rear drum, a bank of inclinedtubes connecting said drums, a

pair of drums and connecting water-tubes in each of the two lowerpasses, water-circulators connecting each upper with alower drum, anda-steam collector and superheater in the upper pass, connected with thedrums of themiddle pass.

8. In a water-tube boiler, two horizontal gaspasses, a'

pair of drums, and connecting tubes in each pass, watercirculatorsbetween each upper. drum and lower drum, baiiiing arranged to direct thegases upwardly along one bank of water-circulators, and a bridge in theupper pass in front of the said bafiling to direct and confine the gasestherein so as to cause them-to travel among the tubes in said pass.

Signed at littsburg, Pa., this 17th day of February,

EDWIN G. RUST. Witnesses:

F. N. BARBER,

C. E. Eeonns.

